struts source reading diary 1

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struts source reading diary 1 一、RequestUtils的一个方法，使用application的classloader加载class，这个应该和不同的appserver实现相关 public static Class applicationClass(String className) throws ClassNotFoundException { // Look up the class loader to be used ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); if (classLoader == null) { classLoader = RequestUtils.class.getClassLoader(); } // Attempt to load the specified class return (classLoader.loadClass(className)); } 以下是log4j的源码，一样是调用context class loader, 就这段描述来讲log4j比struts更严谨:) private static ClassLoader getTCL() throws IllegalAccessException, InvocationTargetException { // Are we running on a JDK 1.2 or later system? Method method = null; try { method = Thread.class.getMethod("getContextClassLoader", null); } catch (NoSuchMethodException e) { // We are running on JDK 1.1 return null; } return (ClassLoader) method.invoke(Thread.currentThread(), null); } 二、在ActionServlet.initServlet()方法中的Digester Digester是Jakarta 子项目Commons下的一个模块，支持基于规则的对任意XML文档的处理。它最初是Structs项目的一部分，后因其通用性而划归Commons.